I don't know about your twitter experience, but mine has been loaded with Spammers of late. What if we used money as a way to get a better signal-to-noise ratio? What does that interaction look like?

Second, what if we eliminated user accounts, making it more like the Citizens Band Radio, and less like Email. Squeelr is a common place to write stuff.

It's true, we already have many other places to write and give our opinions, but Squeelr is a funny mix of existing technologies. It's an iPhone application first, and so integrates with the camera and geolocation abilities of that target. It's a microblogging type service. But it's also completely controlled by the users, like a wiki--if you don't like something, delete it.